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#11
Welcome to the forum,
I'm afraid there's no free voices I'm aware of, that link above does mention a
couple of Pay for solutions for adding voices, I'll post the links for you if your
interested. They are not cheap!
Here's one with a free trial, and a selection of voices.
Text to Speech Software with AT&T Natural Voices™, Acapela™, Nuance™ Voices
This one has a free trial also and different voices.
Acapela Group infovox Desktop for Windows
Sorry that's the best I can find for you.